[wrapper-tracing] WebGL and friends: Add write barriers

third_party/WebKit/Source/modules/webgl/WebGLProgram.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLProgram.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLProgram.cpp b/third_party/WebKit/Source/modules/webgl/WebGLProgram.cpp
index a0c047befdbadad7e0ab7cd4f4850d8415e9b9a7..8b37ee499751a11c6e22b4a7db1c8ec0a0476fbd 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLProgram.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLProgram.cpp
@@ -25,6 +25,7 @@
 
 #include "modules/webgl/WebGLProgram.h"
 
+#include "bindings/core/v8/ScriptWrappableVisitor.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "modules/webgl/WebGLContextGroup.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
@@ -106,11 +107,13 @@ bool WebGLProgram::attachShader(WebGLShader* shader) {
       if (m_vertexShader)
         return false;
       m_vertexShader = shader;
+      ScriptWrappableVisitor::writeBarrier(this, m_vertexShader);
       return true;
     case GL_FRAGMENT_SHADER:
       if (m_fragmentShader)
         return false;
       m_fragmentShader = shader;
+      ScriptWrappableVisitor::writeBarrier(this, m_fragmentShader);
       return true;
     default:
       return false;